Check-rower



(No` Moldel.)

L. SGOFIELD.

CHECK ROWBR.

No. 283,425. Patented Aug. 21, 1883.

@iin/5565: Invenvr:

n. PETERS. mau-mgm. wunanwn n c.

t UNITED STATES PATENT OEEIGE.

LEVI SCOFIELD, OF GRAND HAVEN, MICHIGAN.

CHECK-ROWER.

SPECFIGATION forming .part of Letters Patent No. 283,425, dated August 21, 1883,

Application filed May 16, 188.'.5. (No modem A To all whom t may concern,.-

Be it known that I, LEvi ScorrELn, of Grand Haven, in the State of Michigan, have invented a new and useful Improvement in Check-Bowers for Corn-Planters, of which the following is a description, vreference being had to the accompanying drawings, in which- Figure l is a plan view of my improvement. Fig. 2 is a cross-section taken on the line x a: in Fig. 1. Fig. 3 is a perspective view ofthe four-armed lever, hereinafter described.

My invention relates to that class of cornplanters in which the dropping-slide is actuated, through connecting devices, by a knotted or beaded rope or wire stretched across the field and suitably connected with the planter; and it consists in certain improved devices for transmitting the power to and actuating the' dropping-slide, all of which will be hereinafter more fully described, and pointed out definitely in the claims.

As the general construction of this class of corn-planters is well known'in the art, I deem it unnecessary to exhibit or describe the same, as my improvement is adapted to any of the ordinary forms of this class of planters.

In the drawings, A A are .bearings attached to opposite sides of the planter, preferably to the usual board or beam which extends across the planter from one seed-hopper to the other, and a shaft, B, is mounted in these bearings and provided upon its outer end with any of the ordinary or appropriate devices connecting it with the knotted rope, and whereby it is caused to revolve at regular intervals. This revolving shaft is a well-known feature of construction in this class of planters, and a great variety of devices have been employed to transmit the power from this shaft 'to the dropping-slide.. These devices `are more or less objectionable, principally because of the great friction involved in their working. It

is of the utmost importance that this friction should be reduced to the very minimum, so as to relieve the rope stretched across the field from all possible strain, as wellas to make a light-working machine. The combination of devices for transmitting this motion herein described is believed to be so constructed as to lie operated with the minimum of friction, and

with the greatest certainty and ease of operation.

The cams C C (shown in detail in Fig. 2) are attached upon the shaft with their lines of elongation in opposite directions.A A fourarmed lever, D, having the two vertical arms,

.d and df, and the nearly horizontal arms d2 and 6F, is pivoted at the upper end of the short vertical arm el by a bolt or pivot in the plate E, attached to the framework of the planter beneath the shaft B.

The outer ends of the arms di and da are provided with horizontal friction-rolls F F, which iit in cont-act with the periphery of the cams C C upon the shaft B. rlhe usual reciprocating bar is attached by the connecting-rod Gto the lower end of the short vertical arm d upon the lever D. In operation, the cams G C, by the revolution of the shaft B, bear upon the rolls F F, so as to alternately depress and raise the arms dl and di of the lever D, thus causing the short arm d to vibrate, and thus operate the reciprocating bar of the planter through the pivoted connecting-link G.

An important advantage is secured by mounting the lever D so as to bring the arms d2 and d and the rolls F F directly beneath the shaft B and under the cams C C, ast-he power is thus applied directly in the line of the motion .required-to wit, in aline running tothe axis of the lever D-and, what is an equally important advantage, the periphery of the actuating-cam is thus maintained in continual contact with the rolls upon the lever l), thus giving a smooth and steady motion, while, on the contrary, if the construction were such as to bring the arms di and d3 and the rolls F F at one side of the shaft B, it Vwould be necessary to employ cams of radically dif-V In the preferable. construction the periphery IOO of each of the cams 'C C is slightly beveled and at a different angle in different portions, so that the surface of the periphery in contact With the rolls F shall fit it in all positions of the lever D.

The check-rower above described is simple :in construction, and is operated with ease and with the minimum of friction.

Any of the ordinary or suitable appliances for locking the shaft B during the intervals between the movements of the dropping-slide may be applied in connection Withthis checkrOWer. d

I have provided a simple device for this purpose, Which is described as follows: An ordinary spring-bolt, H, is inserted in`a suitable socket, I,Which is attached to the frame' of the planter `just in front of each of the cams G. A friction-roller, J, is mounted in the outer end of the bolt, and the device is so adjusted that the roller J is brought just beneath and in front of the elongation upon the cam C When the latter is in a horizontal position. When the'elongation upon the cani is thus brought into contact with the roller J, it is retained locked in positionuntil power is again applied to revolve the shaft B, When the cani presses back the spring-bolt I-I and passes it, When the movement being completed the spring-bolt opposite the other cam locks it in position in a similar manner, thus preventing the shaft B from being carried beyond the re-n quired quarter-revolution by its momentum.

Having thus described my invention, what I claim as new, and desire to secure by Let ters Patent, is-

l. In a check-rower, the combination of a revolving shaft provided With two cams having their lines of elongation in opposite directions and transverse to the shaft, with a pivoted lever provided at the ends of its horizontal arms with horizontal rollers in contact with the periphery of the cams, and which actuates ,ing shaft and cams, and in contact with the periphery of the cams, substantially as and for the purpose set forth.v

3. In a check-rower, the combination, with a pivoted lever actuating the reciprocating bar, and having rolls at the extremity of the arms extending upon each side of its axis, of elongated cams mounted upon the revolving shaft of the planter, and having their peripheries beveled at a different angle in different portions, yso as to fit the rolls in all positions of the pivoted lever, substantially as described. 4. In a check-rower, the combination of a revolving shaft provided Witliftwo cams having their lines of elongation in different directions, a pivoted lever actuating the reciprocating bar of the planter, and operated by the' cams, substantially as described, and a locking mechanism,consisting of spring-bolts,provided with rollers in their outer ends which abut against the elongated portion of the cams when they are in a horizontal position, substantially as andfor the purpose set forth.

' LEVI SCOFIELD. Vitnesses: l o

E. L. TnURsroN,

T. S. E. DIXON. 

